Driving-pinion for rolling-mills.



W. G. NICHOLS.

DRIVING PINION FOR ROLLING MILLS.

APPLICATION FILED SEPT. 27,

Patented Sept. 9, 1913.

WITNESSES KZW ATTORNEY manufactured.

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WESLEY G. NICHOLS, OF CHICAGO HEIGHTS, ILLINOIS, ASSIGNORTO EDGAR ALLENAMERICAN MANGANESE STEEL COMPANY, OF AUGUSTA, MAINE, A CORPORATION orMAINE.

DRIVING-PINION FOR ROLLING-MILLS.

To all whom 2'2 may concern 7 Be it known that I, WVEsLEY G. NICHOLS, acitizen of the United States, and a resident of Chicago Heights, in thecounty of Cook and State of Illinois, have made and invented certain newand useful Improvements in Driving-Pinions for ltolling Mills, of whichthe following is a specification.

My invention relates to an improvement in driving pinions especiallydesigned for severe service such for instance as driving the rolls inrolling mills, the object thereof being to provide a pinion in which thegear teeth are formed upon a sleeve separate from and secured to thedriving shaft, in stead of being formed integrally with a section of theshaft through which the rolls, or similar devices, are driven, as hasusually been the case. This feature of construction enables me to formthe driving shaft itself, or a section thereof, from Wrought metalespecially adapted for that purpose, such as forged nickel steel, and toform the sleeve carrying the gear teeth, which must necessarily beformed from cast metal, from manganese steel, a material possessingqualities of toughness and hardness to a degree rendering it especiallywell adapted for use in pinions of this character.

In order to secure a pinion having teeth of manganese steel, the pinionitself, and a section of the driving shaft have been commonly formed asa single integral casting, notwithstanding the fact that such steel isnot considered the best metal from which to form the shaft. Suchcastings have been difficult to make, and unduly expensive, and open tothe objection that defectsnot readily detected, and hard to avoid, oftencause the rejection, or failure in use, of an exceedingly expensivecasting.

In the practice of my invention, the difiiculties above enumerated areavoided, and the portion to be cast from manganese steel is sosimplified in form as to be more readily The weight thereof is greatlyreduced, and the driving shaft formed from a. material capable of beingforged, thus reducing the cost of the pinion as a whole, which isconsidered as including a section of the driving shaft, and rendering itbetter adapted for the purpose for which it is designed.

With the objects of invention above enumerated in view, my inventionconsists in Specification of Letters Patent.

Application filed September 27, 1911.

Patented Sept. 9,1913. Serial No. 651,637.

the improved driving pinion hereinafter described and claimed, andillustrated in the drawing accompanying and forming a part of thisapplication.

In the drawing wherein the preferred embodiment of' my invention isillustrated; Figure 1 is a view partly in side elevation andpartly insection showing my improved driving pinion, and, Fig. 2 is a viewshowing a section upon a transverse plane indipazted by the line 22,Fig. 1, looking to the e t. s

Referring to the drawing 3 represents part of a section of a drivinshaft and 4 an enlarged portion thereo circular in cross-section uponwhich a shell 5 is placed, which shell has gear teeth 6, formed upon itsperiphery, the number, arrangement, and form of such teeth being amatter of design and determined by the particular service for which thepinion is intended. The shell 5 is secured to the enlarged portion 4 ofthe shaft in part by friction between the two, and in part by keys 7 Thedriving shaft 3 is formed from wrought metal such as nickel steel, andis given the required shape and size preferably by forging processes,the result being a shaft well adapted to withstand the torsionalstresses met with in heavy service.

The shell 5 and gear teeth 6 are formed from cast metal, such asmanganese steel, the proper form being thus imparted to the teethwithout machining the same, the material specified resulting in teeththat are extremely tough and hard, and which are especially well adaptedto endure and give long and satisfactory service when used to drive therolls in rolling mills. The shell 5 is preferably cored internally, asshown at 8, in order to reduce the amount of metal therein and toprovide for a more uniform thickness throughout the same.

Having thus described and explained my invention I claim and desire tosecure by Letters Patent 1. Driving means comprising a wrought metalshaft and an annular shell continuous throughout its circumferencesecured in place thereupon; said shell being formed from east manganesesteel and having a series of gear teeth upon its periphery, and havingalso a series of recesses extending outward from said shaft into thebody of the shell and located in line with the teeth aforesaid, each ofsaid recesses having a single opening leading thereinto.

2. An annular shell continuous throughout its circumference formed fromcast manganese steel and having a series of gear teeth upon itsperiphery; and having also a series of recesses extending outward fromits inner surface and into its cast metal body portion, said recesseshaving each a single opening leading thereinto and the location of saidrecesses being in line with the teeth aforesaid.

3. Driving means comprising a Wrought said, each of said recesses havinga single opening leading thereinto.

Signed at Chicago Heights, in the county of Cook, and State of Illinois,this 12th day of June, A. D. 1911.

VESLEY G. NICHOLS. Witnesses:

JN'o. G. COUGHLIN, CHARLES PAITSTROM.

. Copies of this patent may be obtained for five cents each, byaddressing the Commissioner of Patents, Washington, D. C.

